JaysHatcH

So was wondering how difficult it is to change the odometer reading on a cluster. I'm planning to purchase an sir or ctr cluster in the next few weeks and found one mint for deals just has 300k+ km on it. Since I'm buying a jdm engine was planning on setting it to the mileage the motor has on it to atleast keep some sort of record of ware. Any help or suggestions are appreciated.